Logic Masters Deutschland e.V.

Normal Sudoku rules apply, along with normal killer, little killer, palindrome, XV and Knight's move rules:

Numbers outside the grid indicate the sum of the digits along their marked diagonal.

Digits along a grey line must form a palindrome.

The number in the top corner of a cage indicates the sum of its digits.

Digits separated by a Knight's move must be different.

Digits joined by a V or an X must sum to 5 or 10, respectively. (Not all such pairs are indicated.)

https://f-puzzles.com/?id=y4ynovod